Comment # 7 on bug 1141204 from Martin Li��ka

(In reply to Michael Vetter from comment #6)
> > And I can confirm that adding -fno-lto to lxqt-panel works.
> 
> I was just setting things up :-)
> Ok, so that means all that I need to do is add the
> > %define _lto_cflags %{nil}
> to the spec file of LXQt panel? Probably no underlying library is affected.

Yep, I'll prepare a submit request.

Coredump happens here:
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f04f5d5b100 in QLayout::setEnabled(bool) () from
/usr/lib64/libQt5Widgets.so.5
[Current thread is 1 (Thread 0x7f04f3ea0800 (LWP 1857))]
(gdb) bt
#0  0x00007f04f5d5b100 in QLayout::setEnabled(bool) () from
/usr/lib64/libQt5Widgets.so.5
#1  0x000056553a2dec35 in ?? ()
#2  0x000056553a2bf934 in ?? ()
#3  0x000056553a30f796 in ?? ()
#4  0x000056553a30e1b2 in Plugin::loadLib(ILXQtPanelPluginLibrary const*) ()
#5  0x000056553a315cfc in Plugin::Plugin(LXQt::PluginInfo const&,
LXQt::Settings*, QString const&, LXQtPanel*) ()
#6  0x000056553a31da24 in ?? ()
#7  0x000056553a31e269 in LXQtPanel::loadPlugins() ()
#8  0x000056553a31f571 in LXQtPanel::LXQtPanel(QString const&, LXQt::Settings*,
QWidget*) ()
#9  0x000056553a3177c5 in ?? ()
#10 0x000056553a2b8ebf in ?? ()
#11 0x00007f04f6592bcb in __libc_start_main () from /lib64/libc.so.6
#12 0x000056553a2b8ffa in _start ()

It would be probably good to report that to upstream..